It's so strange. I have 3 versions of srb2 (one that's vanilla, the other two having extras added), and for whatever reason in the non-vanilla versions, I literally can't drown, even after sitting for like 10 minutes. It's a strange thing to be upset about, but it takes away from the challenge of the game, which annoys me. Anyone know why this could be happening?

When I say non-vanilla, I'm just meaning copies of the game where I've added a bunch of WAD files and whatnot. Mario.wad has "UNDERWATERTICS = -1" in his maincfg file, could that be it? What is that supposed to be by default?